javascript - 如何通过迭代内生成的字符串访问 JSON 对象索引

Question

我有以下 JSON 对象:

value = {
"montoBase01": 10,
"montoBase02": 5,
"montoBase03": 34,
"montoBase04": 5,
"montoBase05": 25,
"montoBase06": 134,
"montoBase07": 25,
"montoBase08": 345,
"montoBase09": 23,
"montoBase10": 45,
"montoBase11": 234,
"montoBase12": 5
};

我想使用循环函数(例如 for)检索每个索引

for(i=1;i<=12;i++){
   var index = ""; 
   if(i<10)
      index = "montoBase0"+i;
   else
      index = "montoBase"+i;
   var mb = value.index
}

但是我总是得到未定义的值，是否可以动态检索索引？如果是，我的代码有什么问题？

Answer 1

您可以使用Object.entries()来迭代对象的属性和值

let value = {
  "montoBase01": 10,
  "montoBase02": 5,
  "montoBase03": 34,
  "montoBase04": 5,
  "montoBase05": 25,
  "montoBase06": 134,
  "montoBase07": 25,
  "montoBase08": 345,
  "montoBase09": 23,
  "montoBase10": 45,
  "montoBase11": 234,
  "montoBase12": 5
};

for (let [key, val] of Object.entries(value)) {
  // do stuff with `key`, `val`
  console.log(key, val);
}